command line audio player that plays any .mp3 or .wav file. It MUST have command line options to chose a specific audio device for output and also to play the file on repeat or not. It must be able to run in the background and it must be possible to run multiple instances simultaneously, each instance using a different audio device for output. There must be a command line option to stop/terminate each instance running in the background. Will be used on macOS High Sierra.